Infant&#39;s mattress



FIG. 1 is a top plan view of an infant's mattress showing my new design;

FIG. 2 is an end elevational view thereof, the opposite end being a mirror image of that shown;

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image of that shown;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a perspective view thereof.

The cross-hatching is intended to represent conventional fabric and is understood to repeat uniformly over the areas shown. 

The ornamental design for an infant's mattress, as shown and described. 